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Sagawa et al. 1991
Sagawa, E., Iwamoto, I., Watanabe, S., Whalen, B.A., Yau, A.W. and Fukunishi, H. (1991). Low energy upflowing ion events observed by EXOS-D: Initial results. Geophysical Research Letters 18: doi: 10.1029/91GL00028. issn: 0094-8276.

Intial observations of low-energy upflowing ion events from the Suprathermal Ion Mass Spectrometer (SMS) on EXOS-D are presented. The SMS instrument on EXOS-D measures the mass composition, energy and angular distributions of thermal and superathermal ions in the 0.1--4000 eV/q energy-per-charge and 0.8--70 amu/q mass-per-charge ranges. Two events are examined. The first features predominantly conical ion pitch-angle distributions and the second has mainly field-aligned distribution. Both events displayed small scale variations in upward flux, composition, and angular characteristics, and coincided with small-scale magnetic field fluctuations. In both events, the peak He+ and H+ fluxes were comaparable; the O+ flux was a factor of 5--10 larger. The pitch-angle distribution often switched rapidly between field-aligned and conical. ¿American Geophysical Union 1991

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Abstract

Keywords
Ionosphere, Particle acceleration, Ionosphere, Ionosphere-magnetosphere interactions, Magnetospheric Physics, Auroral phenomena, Space Plasma Physics, Charged particle motion and acceleration
Journal
Geophysical Research Letters
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Publisher
American Geophysical Union
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